Hydraulic machine for molding glass articles



Dec. '24, 1940. J. B. HAWLEY, JR., 2,225,631

y HYDRAULIC MACHINE FOR MoLDiNG. GLASS ARTICLES*- ETAL.

FiIed Jan. 14, 1957 l5 Sheets-Sheet `l Dec. 24, 1940. .1. B. HAwLEY,JR., Erm. 2,225,631

I HYDRAULIC MACHINE FOR MOLDING GLASS ARTICLES Filed Jan. 14, 1533? 15sheets-sheet 2 ATTORNEY Dec. 24, 1940. .A1, B. HAwLEm'JR., Erm.2,225,531

HYDRAULIC MACHINE FOR' MOLDING GLASS ARTICLES Filed Jan'. 1 4, 1937 15sheets-sheet 3 IN V EN TORS ATTRNEY l J. B. HAWLEY, JR., EI'AL HYDRAULICMACHINE FOR HOLDING GLASS. ARTICLES- Filed Jan. 14. 1957 15 Sheets-Sheet4 prob 4 114A a 4 9- is, A

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Dec. 24, 1940.

I HYDRAULIC MACHINE FOR MOLDNG GLASS ARTICLE-S Filed Jan. 14,",1937 15sheets-sheet 5 Oman www mwN

Y l INVENTORS AT'ToRNEY J. a HAwLEY, JR., Erm. 2,225,631

HYDRAULIC MACHINE FOR HOLDING GLASS "ARTICLES Dec. 24, 1940;

Filed Jan. 14, 1957 15 sheets-sheet e Dec. 24, 1940. '.l. B. HAWLEY,JR., Erm. 2225631 HYDRAULIQ'MCHINE FOR-MO'LDING GLASS ARTICLES K I l5Sheets-Sheet 7 Filed Jan. 14, 1 937- iIN1/EN ToRJ' BY n f ATTORNEY 24,1940- J. B. `HAwL'r-n?, JR., .ETAL v 2,225,631

HYDRAULIC MACHINE FOR MOLDING GLASS ARTICLES Filled Jan. 14, 1957' 15sheets-sheet 8 JNVENToRs BW ATToR NEY' Dec; 24, 1940.

J. B. 'HAWLEY, JR., ErAL HYDRAULIC MACHINE vFOR MOLD-ING GLASS Fileduan.14, 1957 ARTICLES 15 Sheets-Sheet 9 INVENTORS BY ATTORNEY Dec. 24,1940.J. B. HARWLEY, JR., 'E1-Al.' 2,225,631

HYDRULM MACHINEv FOR MOLDING GLASS ARTICLES l5 Sheets-Sheet 10 FiledJan. 14; 1937 as INVENToRs 01 q I i z ATTORNEY De@ 24, 1940- J. BHAWLEY, JR., E-rAl. 2,225,631

HYDRAULIC MACHINE FOR MOLDING GLASS ARTICLES Find Jan. 14, 1937 15sheets-@reet 12 302 J l `i ll nl l" :|1 424 i 49a u l z l Ii o V| O n 'l1 m 27 l O t l l 4H 301 l ll': Z5 1 l r 337 I! l y 315 11i/i: l MEME o:7E MII :r 19.

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A TTORN EY Dec. 24, 1940.A v .1. B. HAwLEY, .JR., ErAL 2,225,631

AHYDRAULIC MACHINE FOR HOLDING GLASS ARTICLES" Fi1ed Jan. 14, 1957 15Sheets-sheet 15 ZZ.I

' INVENToRs' A TTORNEYl Dec.v 24, 1940; Y J. B. HAWLEYQJR., Erm.2,225,631'

HYDRAULIC MACHINE FOR MOLDING GLASS ARTICLES Filed Jan. 14,'1957flssheets eet 1s 55 Mull lg Y I unrwa @@@m @il QJII'Q` @QQs/Il l I l!! i@Q'II stdaa@ #a ATTORNEY lPatented Dec. 24, 1940 HYDRAULIC MACHINE FoaMomma GLASS ARTICLES John B. Hawley, Jr., Irving Nelson, and Daniel F.Hallberg, Minneapolis, Minn., and Earl Cannon, Rockville Centre, N. Y.,assignors to Owens-Illinois Glass Company, a corporation of OhioApplication January'u, 1937, serial No. 120,622

18 Claims.

Our invention relates to machines for molding hollow glass articlesincluding bottles, jars and various other kinds of hollow ware. Theinvention includes machines of the suction gathering 51 type, as, forexample, automatic machines of the Owens type. Such a machine includes ahorizontally rotating mold carriage on which are mount. ed. dip heads orunits, each carrying a suction gathering mold or molds. The dip headsare l brought periodically and in .succession over a pool or supply bodyof molten glass. The head is then lowered and the mold thereby broughtinto dip to receive a charge of glass by suction and form a parisonwhich isthereafterstransferred to l a finishing mold in which it isblown to the form of the finished article. The invention in itspreferreclI form embodies a hydraulically operated machine in which themold-carriage is driven by vhydraulic power and the major operationseffected and controlled by hydraulic mechanism.

In automatic machines now in general use for the manufacture of bottles,jars, etc., many difp ferent individual movements Aor operations areinvolved in the process of forming a complete article, including therotation of the mold carriage, V

the-individual movements of the dip heads and gathering molds during thecharge gathering operations, the opening and closing movements of themolds, the application of suction and air pressure for gathering andforming the blanks, the transfer movements by which the parisons aretransferred to the finishing molds, and various other movements andoperations. 'All of these movements must be coordinated and effected inthe proper order of sequence.

necessary to provide adjusting means for adjustably regulating the timeof initiation and length of duration of different operations as re- 40quired by changes in temperature and other variable conditions 'met within practice. Adjustments must also be made to adapt the variousoperations to the size,` shape, wall thickness and other characteristicsof the particular ware which is belngproduced. l i

An object of o ur invention is to provide a practical machine embodyingadiustment features to meet the above noted requirements, 'and whichlhas great ilexibility and ease of adjustment, adapting it for use inthe manufacture of articles which vary widely in sha-pe. size and otherproperties.

Another object of the invention vis to provide an improvedl machine ofthe type comprising a rotary mold carriage on which are mountedl a typeincluding a rotating mold carriage and a In the production of high gradeware it isl plurality o! individual heads or units, which improvedmachine is compactly built and of smaller size and mold radius thanmachines of this type now in general use, and, moreover, to provide sucha machine which isadapted to make bottles of 5 other articles of varioussizes, shapes and capacities, each head operating to make articles of'aparticular design independently of the size, shape or othercharacteristics of the articles being made at the same time on the otherheads of the machine. In the attainment of this object, we provide a.machine driven and controlled by hydraulic power. mechanism which isparticularly adapted to provide a wide range and flexibility ofadjustment of the timing, extent and duration of. the various movementsor operations, and synchronization of the operations individual to eachhead or unit with those of the other units of the machine.

A further object of the invention is to provide a machine in whichseparate power `devices or motors are'provided for eecting the majoroperations, combined with means for synchronizing suchoperations, andhand operated mechanism for adjusting the speed of .the machine as awhole while maintaining synchronization of the dlerent operations. Morespecifically, the invention provides hydraulic means or motorsfor themajor driving operations combined with adjust--4 ment devices by which1s obtained the nenbmty of adjustment and control permitted by the use-of such hydraulic means.

A novel feature of our invention consists in the provision, in a machineof the suction gathering series of mold carrying heads or units thereon,of novel means for periodically accelerating and l decelerating themovement of the mold carriage' to permit a slow movement of the carriageduring each charge gathering operation and a relatively rapid movementbetween charge gathering operations. In this manner, the gathering moldswhile in dip or in contact with the supply bodyA of lglass from whichthey draw their charge by suction, are given a relatively slow movementduring the gather. This results in a material reduction in the timerequired to lill the mold. and insures a good seal between the mouth ofthe slowly moving mold and the pool or supply body of glass. Ourinvention, by providing for a slow 50 movement of the molds during thegathering opY eration, enables such operation to be eiected vwhile themold travels through a comparatively short distance over the supply bodyand thereby permits a corresponding reduction in the exposed gatheringarea. This in turn reduces the amount of chilling at the gathering areaand permits proper temperature conditions of the glass entering 4themolds.

Our invention, by providing hydraulic means for accelerating anddecelerating the speed of the mold in the vmanner above noted, permitssuch .changes in the speed to be made smoothly and rapidly with muchless strain on the mechanism than occurs with other mechanisms used forchanging the speed of the mold carriage and, moreover. permits the useof greatly simplified mechanism. t

A further-feature of our invention consists in providing in connectionwith the hydraulic Jmeans for changing the speed of the mold carriage,ad-

justing means by which the speed may be adjustably varied to any degreethat may be desired.

A further feature of the invention consists in driving the machine byhydraulic mechanism which in turn is driven with constant speed elec.-

tric motors. The electric motors can, be controlled either selectivelyor a's a group.

Other objects of our invention will appear hereinafter in the followingmore detailed description of our invention.

Referring to the accompanying drawings:

Fig. 1 is a partsectional elevation view of a machine constructed inaccordance with our in- .vention;

' pump and motorby which the mold carriage is i vertical plane of theaxis;

v' mechanism for controlling the movements of the driven, and thehydraulic circuits and controlling devices therefor, certain parts ofthe mechanism being shown in sectio Fig. 5 is a diagrammatic viewshowing a hydraulic motor for opening and closing the blank molds, ahydraulic motor for lifting and lowering the finishing mold carrier, andvalve mechanism and 1 hydraulic vcircuits for said motors, certain partsof the meghanismbeing shown in section; 1

Fig. 611s a sectional plan view of the machine, the vsection being takenat the line VI-VI on Fig.16; v v

Figs. '7 to 13 relate particularly to mechanism for lifting and loweringthe dip heads @which carry the blank molds; l f

Fig. 7 is a detail view in; sectional elevation showing one of thehydraulic-piston motors (herein termed a dip head motor)' for liftingand lowering'a dip head and the blank mold carried theredraulic pump(herein termed the dip headpump) which operates the dipy head motors,said view being in a Dump;

F18. 9 is a sectionalelevation of the same in the Fig'. 10 isahorizontal section at the line X-X on Fig. 3, showing mechanism forcontrolling the dip head pump; s

Fig. 11 is a bottom plan view of cam controlled dip heads;

'Fig. 12 is a section at the lin'e X11- XII on Fig. 8 is a centralsectional elevation of the hyplane perpendicularto the axis of the iFig. 13 is a section at the line XIII-XIII on Fig. 7; Fig. 14 is a planview of a nishing mold and its operating mechanism;

Fig. 15 is a section at the line XV-XV on Fig. 14;

Fig. 16 is a central vertical section of the nlshing mold and itsoperating mechanism;

Fig. 16A is a sectional view of a spring buffer device for cushioningthe finishing mold carrierv as it completes its downward movement;

Fig. 17 is a front elevation showing a blank mold unit;

Fig. l8 is a sectional side elevation of a blank mold unit, the moldbeing shown in its lowered position for ,gathering charges of glass;

Fig. 19 isa side elevation of the blank mold unit with the mold in itslifted position;

Fig. 20 is a4 fragmentary view showing means for supporting the dip headindependently of its cam;

Fig. 21 is a section at the line XXI-XXI on Fig. 19;

Fig. 22 is a diagrammatlc'view with. certain parts shown insectionfshowing the dip pump, the dip head operating motor driventhereby, the blank mold'cracking motor .and its pump, the

`knife operating m'otor, and the hydraulic circuits and controllingdevices for said pumps and motors; l

Figs. 23, 24,and 25 are diagrammatic views of the cams shown in Fig. 3for controlling the main hydraulic pumps;

Fig. 23 shows the cam for controlling themain` i drive pump by which themold carriage is driven; Fig. 24 shows the 'cam for controlling the upand -down movements of the dip heads;

- Fig. 25 shows the cam controlling theglifting and lowering of the4finishing mold carriers;

Fig. 26 is a diagrammatic view of the cam which mechanically controlsthe movements of the dip heads; and

' Fig. 27 is a timing chart indicating the timing and sequence of thevarious operations.

General construction A general statement of the construction andarrangement of parts will now be given, followed by a more1 detaileddescription of the machine and mode of operation. 'I'he machinecomprises a mold carriage mounted to rotate about .a tubularcolumn I 90(see Figs. 1, 6- and 16) boltedtoand rising from a horizontal plate Inlwhicnforms l part of the base of the machine. The moldear? riageincludes ve heads or units symmetrically arranged about the axis of thecarriage.;` I Each-v unit includes a mold group and their operating:

mechanisms.

Each lmold group includes a blank moldxiiif.I

(see Fig. 18), la neck mold Ill above andin register with the blankmold, and a finishing mold IM (Fig. 16). The blank andl neck molds to-`gether form a parison mold which. during each` P #'I'he blank mold isthen opened and the finishing 'I'he major operations of the machine are.

effected by power supplied from three motordrlven hydraulic pumpsmounted on the base of the machine, as shown in Figs. 2, 3 and 3A.

These -include a rotary pump ||3 (hereinafter 10. referred to as thedrive pump) directly connected to and driven by an electric motor ||4, arotary pump IIB (hereinafter referred to as the dip pump) Idriven by anelectric motor IIB, and a rotary pump ||1 (hereinafter referred to asthe mold carrier pump) driven byan electric motor I I3. The drive pump||3 operates'v through mechanism hereinafter described to continuouslyrotate the mold carriage at a periodically varying speed. 'I'he dip pumpI I5 operates a piston type hydraulic motor by which the dip headscarrying the blank molds are lifted and lowered. The mold carrier pumpdrives the hydraulic motors for lifting and lowering the finishing lmolds. An electric motor ||9 (Figs. 2 and 3) also mounted on the machinebase, operates a slippage pump 2| anda pump |22 which actuates the blankcrack motors vby which the blank molds are given an initial openingmovement.

3 the molds 'and for cooling purposes is .supplied y to the severalunits through a distributing head |23 (Fig. 1) at the top of themachine, said head being supported on the column |00. 'Ihe air underpressure is conducted to the distributing headvthrough pipes |24 and |25(Fig. 13) 'which extend upward to the distributing head through lthecolumn |00. The application of vacuum to the molds for gathering andshaping the glass therein is controlled through vacuum lines lead-- 40ing to the distributing head from which the main vacuum pipe |26extendsdownward through the column' |00 and through the base of themachine to a suction pump or 45 vacuum.

Machine base ''he machine base (Figs. 2, 3 and 3A) includes a main baseplate or platform |21 which provides a support for the entire machine.Abovethis base plate is an oil reservoir or tank |20 from which oil issupplied to the hydraulic pumps and motors. Wheels |29 which carry themachine are mounted on axles |33 having bearings in brackets |3|attached to the side walls 55 of the tank |23. The wheels run on tracks|32, permitting the machine to be moved to and from the gathering tank`|03.

' .Carriage drive 70 Referring tov Figs. 2 to 4, inclusive,themechanis'm for rotating the mold carriage is as fol- Vwlowsill'herotary hydraulic pump ||3, when driven by the electric motor |I4, drawsthe oil or other operating fluid from the lreservoir |20v "54 throughpipe une m. The ou is driven by the sleeve |48 in the oil reservoir.

' Air under pressure for blowing the glass in' l other source of Asubbase.pla|ie |33 I, is spaced below the main base plate .I 21. Beneathwhich, with the member |34, provide an annular pump through pipe line|38 to the rotary hydraulic motor II4A, thereby driving the latter.`

The oil after circulating through the motor is returned to the tankthrough pipe line |39 (Fig. 4), a differential valve |4| and pipe 42.

The oil in the reservoir is maintainedat a working temperature bycirculating a temperature regulating iiuid through4 a pipe line |43(Fig. 2) within the oil reservoir. During the normal operation, this uidmay consist of cold water for extracting heat from the oil. However, instarting the apparatus when cold, it is sometimes necessaryV to heat theoil to a working temperature and this is done by circulating steamthrough 'the pipe |43. 'I'he pipe line |31 includes a section |31*within the oil tank and -extending lengthwise thereof, through whichsection the pipe |43 extends. With this arrangement, the oil suppliedtothe driving pump I I3 is brought into close contact with the pipe |43sothat itsA temperature is effectively controlled. The shaft of themotor ||4A has a worm driving connection |44 with a vertical drive shaft|45 which extends upward through -a bearing Secured to the upper endofthe drivek shaft is a pinion |41 which meshes with an annularl drivegear |48 (Figs. 1 and 2) on the lower end of the mold carriage. i

Referring to Fig. 4 which shows diagrammatically the circuits for thedrive pump` and motor, check valves |49, |49", |491 and |49 are placedin the circuits as'indicated. These are one-way valves which permit aflow in the direction indicated by the arrows. Pressure relief valves|50, |50n and |5||b are also provided.

As above described, the circulation oioil is from the tank through pipe|31 to the pump ||3 and from the pump "to the .-notor- ||4A through pipe|33. However, the direction of iiow through the pump and motor, andlconse- `quently .their direction of rotation, may be recheck valve I49", and line |39 to the motor ||4A.

From the motorthe oil is returned to the tank by way of the differentialvalve |4|, pipe |42 and pressure relief valve 50.

The valve |4| is connected across the pipe lines |39 and |39 extendingfrom the terminals of the hydraulic motor ||4A so that the position ofthe valve piston is controlled by the pressure diil'erential betweensaid terminals. 'I'he construction of the valve is such that it openscommunication from the low pressure or exhaust port of the motor to thetank. The arrangement is such that the motor canbe driven by the pump ineither direction and without either the pump or motor being shortcircuited by the pipe lines leading to the tank.

The relief valves |50 and |50'A are connected in circuit betweenthe-tank and the lilies |51 and |38 leading, respectively, tothe pumpterminals or ports. .Any excess pressure built up in the line |31 willoperate reliefV valve |50, permitting a return flow to the tankindependently of the'v pump. 'Ihe relief valve I50"will operate lin likemanner to-prevent any excess pressure being built up inthe lineV |33.Such pressures may be caused by'an overload onthe motor I|4A, the reliefvalves then providing a return circuit from the pump to the tankindependently of the f motor, thereby .preventing an overload on theinto the lower Dump ' Dip -head mechanism A description will now begiven of the mechanism by which the dip heads |01 which carry thegathering molds are-lowered to bring the molds into dip while traversingthe gathering area and then lifted. The lifting and lowering movementsof all the dip heads are effected by the piston motor |08 (Figs. 3 and7), which motor is driven by the rotary hydraulic pump ||5, the latterin turn being continuously driven by the electric motor ||6 (Fig. 3A)the drive shaft |65 of which is directly connected to the drive shaft ofthe pump ||5. Pipes |66 and |61 extend from rthe motor I |5 to the motor|08, opening, respectively,

and upper ends of the motor cylinder. 1

The motor v|08 .comprises a piston |68 and piston rod |69. Averticalconnecting rod |1| (Figs. '1 and 18) is pivoted at its lower end to thepiston rod, and at its upper end is pivoted to the inner end of the cliphead lever 12. Said lever is fulcrumed on a pivot pin |13 mounted in aframe |14 which in turn is mounted on a earn plate |15 fixed to thecenter column |00. The outer end of the dip lever |12 has a pivotalconnection with a block |11 which serves as al connector through whichthe dip heads are connected in succession to the dip lever |12. Thisconnector |11 is mounted to reciprocate vertically and isguided in itsmovements by guide bars |18 on the frame ing block |8| in which the head|19 is journaled'.

|14. 'I'he pivotal connection betweenthe lever |12 and the connector |11includes a cylindricalv bearing head |19 bolted to the lever, and abear- The block |8| is mounted in the connector |11, being free forlimited-movement radially of the machine to accommodate the arcuatemovement ofthe bearing head |19. The connector |11 is formed in itsouterface with a cam track or cate pistons |92 carried by said rotor. Theframe groove |82 extending lengthwise thereof. 'I'he cam track isperiodically brought into alignment with a stationarycamtrack |83(Fig. 1) which is lconcentric with the' mold carriage. Each dip headcarries a cam roll |84 which. runs on the track |83 and controls thevertical position of the dip head.

As each dip head during its travel with the mold carriage, approaches aposition over the gathering tank, its cam roll |84-runs ofi the track|83 onto the track, |82- which at this time is in alignment therewith.'I'he dip leve- |12 is then.

operated by its motor |08 to lower the dip head to the Fig. 18 positionso that the mold |02 brought into dip for gathering its charge; Themotor |08' is then reversed to lift the dip head,

the track |82 being thereby broughtin line again with' the track |83,permitting the diphead to continue its travel with the mold carriage,Awith the cam roll |84 again running on the cam track |83. A

4'I'he rotary hydraulic pump I IS. asshown in Figs. 8 and 9, may be o fstandard construction and need not be described in detail. Briey, it.

|88 is provided with a stem '|98 extending outward through an opening inthe casing and having connections as hereinafter described for shifting.the rotor.

When the drive shaft is rotated, the rotor being mechanically connectedis rotated therewith. If the rotor is eccentric to the drive shaft, suchrotation causes a reciprocation ofthe pistons and thereby forces adriving iiuid to circulate through the pump, the fluid entering by wayof one of the ports |94 and leaving through the other of said ports.When the rotor |81 is shifted from one side to the other of a centralposition,l the direction of iiuid circulation is reversed, thereby re-Versing the piston motor 08.

The lifting and lowering movements of the dip head are positivelycontrolled by mechanical means supplemental to the hydraulic pistonmotor |08. Such mechanical means (see Figs. 3, 7, 1l, 12 and 26)includes a cam plate |85 formed -on its under Asurface with an endless`cam track |96, said cam plate being bolted to the under face of a gearwheel |91 mounted for rotation on a bearing sleeve |98, the latterbolted to the base plate |33. AThe gear wheel |91 is driven by a pinion|99 keyed to the lower end of the drive forms a stop to limitthedownward sliding movement of the link on the rod. o

With .this construction, the lifting or up move-v ments of the dip headsare positively controlled by -t 'cam |96. This control serves as asafety feat e' acting positively to synchronize the lifting movements ofthe dip heads with their rotary travel with the carriage. In thismanner, failure of a dip head to lift the mold at the proper time, whichmightcause interference between the mold and the gathering tank, ispositively prevented. It will be understood, however, that the up anddown movements oi' the dip heads are normally effected\and` controlledby thehydraulic motor |08. The sliding connection between the l-ink4 204and the piston rod |68, permits the link-age between the cam |96 and thepiston rod to oper' ate idly -when any selected dip head is temporarilyheld up by means hereinafter described, and prein its up position, thepistongrod |88 is held in its -lowered position, so that the link204'can slide idly up and down on the rod. rBut when a dip .head isdo'wn, the piston rod is up and holds the the piston'.

, vented yfrom going through its normal' dipping movements. That is tosay, if a dip head is held Speed control and synchronization ofhydraulic `pumps and motors The lspeedsof the .three hydraulic pumpsIig. ||6 and ||1 arecontrolled by cam mechanism which automatically-eilects the .periodic variations in the speed of each pump as`requiredfor the operation lo|!- the various motors driven by the pumps. This cammechanism will now be de' A driving connection between said shaft andgear is provided by a bearing sleeve 206 keyed to and forming anextension of the shaft 205, said sleeve rotating in the bearing sleeve196. 'I'he sleeve 206 is formed with a flange bolted to the hub of thegear wheel 191. Keyed to the cam shaft are cams 201, 208 and 209 (shownin detail in Figs. 23 to controlling, respectively, the dip ,pump 115,the pump 111 for lifting and lowering the finishing mold carriers, andthe drive pump 113 which rotates `fthe mold carriage. It will be notedthat during each complete rotation of the mold carriage, the cam shaft205 isgiven a number of ron tations equal to the number of heads orunits on the mold carriage-in this instance five. Eachcam on said shaft,therefore, operates during a complete rotation of the mold carriage, toeilect ve complete cycles of operations of the pump controlled thereby,namely, one cycle for each head or unit.

The cam 201 operates through the followingA lar sleeve 218 through whichthe lever extenrls and which has a sliding connection with the lever.The sleeve 218 is formed Iwith trunnions 219 journaled in the block 216and providing a fuicrum for the lever. A vertical adjusting rod 221extends through the block 216-and has a screw threaded connectiontherewith. The rod 221 is rotatable manually by means presently to bedescribed, for adjusting lthe block 216, and with it the sleeve 218, upand down, and thereby shifting the fulcrum of the lever 215.

The upper end of` the lever 215 (see Fig. 8) is connected to the 193which as before described, is connected for adjusting the pump shaft andthereby controlling the speed and direction of rotation of the pump. Acoil spring 222 reacts through the lever 215 to maintain the cam roll211 in contact with its cam. The dip cam 201 is so designed that duringeach rotation it operates through the connections just described todrive the dip pump, rst, in the direction required to lift the piston168 (Fig. 7) for lowering a dip head, then stop the pump while the moldis in dip and gathering its charge of glass. .then rotate the drive pumpin the reverse direction for lowering the piston 160 and lifting themold out of dip, andA finally arresting the pump.

The cam 206 which controls the mold carrier pump 111 for effecting thelifting and lowering of the nishing mold carriers, operates throughconnections including a lever 223, .the upper end of which is connectedto the cam roll and the lower end of which is connected through a link224 to the lower end of a lever 225. 'I'he latter extends through abearing block 226, the con.

struction of which may be substantially identical .with that of theblock 216 (Fig. 10). A vertical rod 221 has a screw threaded section 223extending through the block 226 for adlustingthe latter up and down.'I'he upper end of the lever 226 has a connection 229 'with the pump111.

The cam 209 which controls the speed of the drive pump 113, operatesthrough a link 231 and lever 232, the latter having a connection at itsupper end with the pump. The lever 232 extends` through a bearing block233 which may also be of the same construction as the block 216. Anadjusting shaft 234 extends through .the block 233 and has a threadedconnection therewith. The adjusting rods or shafts 221 and 234 arejournaled in bearing brackets 235 and both said shafts extend throughboth the bearing blocks 233 and 216.

A hand wheel 23s is attached to the rod 234.'

Intermeshing gears 231 are keyed to the shafts 22| and 234,respectively. Intermeshing bevel gears 238 and 239 are mounted,respectively, on the shaft 234 and a horizontal shaft 241, .the latterhaving a driving connection through bevel gears 242 and 243 with theshaft 221.

It will be seen that the three adjusting shafts 221, 234 and 221 areinterconnected through the gearing just described, so that rotation ofthe hand wheel 236 will rotate all of said shafts, thereby effecting asimultaneous and synchronized adjustment of the .three rotary drivingpumps. Thus, when the speed of the mold carriage is manually adjusted,the speed and timing of the dip head movements and the movements oi.'the finishing mold carriage will be correspondingly adjusted and.maintained in synchronism.

Finishing mold carriers and mechanism. for lifting and lowering themmolds and their carriers.

Referring to Figs. 14 to 16, each finishing mold 104 isl supported on acarrier unit 244 which is reciprocated vertically, the mold also beinggiven a swinging movement under the control of a cam 256. The piston rod245 of themotor 111 has connected to its upper end a head 246 throughwhich a pivot rod 24'1 extends transversely, the ends of the pivot rodhaving bearings in a frame 246 which forms part of the meld carrierunit. Each frame 240 is mounted for vertical sliding movement in asupporting and guiding frame 249. 'I'he frame 249 (see Fig. 6) comprisessections 'secured by bolts 251 -to the lower plate 252 of the moldcarriage. Guide strips 253 (Fig. 14) overhang the front faces of thevertically sliding frames2l8` and hold them in position within theguiding frame 249.

Each carrier unit 244 includes a swinging frame 244 journaled onthepivot rod 241 and carrying the mold 1-04. The swinging section 244Lincludes a depending arm 254 carrying a cam roll 255 which runs on thecam 256 which controls the swinging movements. Fig. 16 shows thefinishing mold in its lifted or parison transfer position. As the moldcarrier is lowered, it has an initial vertical movement and then theframe section 244l swings inward to the dotted line position (Fig. 16).

This' combined vertical and swinging move-V ment permits a very compactarrangement of the parts so that the mold radius of the machine, orradial distance of the mold from the ams of the carriage, can be mademuch shorter than 'with the usual arrangement found in Owens typemachines .wherein the lifting and lowering of the finishing mold isentirely a swinging movement about a horizontal axis. The presentconstruction also permits the mold to be lowered sumciently to clear thegathering pot 106 while maintaining a relatively short radi-us of swing.

Hydraulic pressure is transmitted from the

